Cash in advance (CIA) payment terms: meaning, due date

Cash in advance (CIA) at a glance

Type

Cash terms

Full amount due

Immediately

Also written

CIA, PIA (payment in advance), CWO (cash with order), prepayment

Example dates

What it means

Cash in advance is a payment term in which the buyer pays before the supplier ships or starts the work. The supplier carries no credit risk because the money arrives first. You will also see it written as CIA, PIA (payment in advance), CWO (cash with order) or simply prepayment. All of these describe the same arrangement: payment comes before delivery, not after.

The due date is the invoice date. There is no net period and no month-end convention. An invoice dated Thursday, Jan 15, 2026 is due Thursday, Jan 15, 2026. An invoice dated Friday, Feb 27, 2026 is due Friday, Feb 27, 2026. An invoice dated Friday, Dec 18, 2026 is due Friday, Dec 18, 2026. In each case the calendar days to due are zero, so a weekend roll does not arise.

That zero-day gap is the whole term. Do not confuse it with a longer net arrangement that a supplier offers after a credit review. Cash in advance is what a supplier asks for when it is not extending credit at all. The document may be a pro forma rather than a final invoice, and the supplier may not ship until the funds clear.

When suppliers ask for it

Suppliers ask for cash in advance when they do not want to carry the buyer's credit risk. A first order from a new customer is the common case. So is a custom or made-to-order item that the supplier cannot resell if the buyer walks away. Small suppliers with limited working capital often ask for it, and so do suppliers who have been paid late by the buyer before.

The request usually arrives before the invoice does, on a quote, a pro forma or an order acknowledgment. Treat it as a term to be reviewed, not a surprise to be absorbed at payment time. Check whether the vendor record already carries a longer term, and resolve the conflict before the purchase order is approved. A vendor record that says one thing while the pro forma says cash in advance will produce a late payment and possibly a held shipment.

Some suppliers ask for a partial prepayment rather than the full amount. Record what was agreed in the purchase order and in the vendor record so that the final invoice is matched against the prepayment, not paid in full on top of it.

Paying safely

Verify the banking details before money moves. Use a phone number or portal you already have for the supplier, not the contact details in the email that requested the change. Prepayments are an attractive target for payment fraud because the buyer has no goods to inspect and no later invoice to compare against.

Match the pro forma to the approved purchase order: vendor, quantity, description, amount and the term itself. Get a document with a unique number, and key the due date as the invoice date. For a CIA invoice dated Friday, Dec 18, 2026, the due date is Friday, Dec 18, 2026; there is no weekend roll to manage and no reason to schedule the payment for the following Monday.

Record the payment as a prepayment against the purchase order, not as a cleared invoice for goods received. When the shipment arrives and the final invoice is posted, apply the prepayment to that invoice. Keep one prepayment reference per purchase order so that a second request for the same money is visible.

Set the approval and the release of funds as separate steps. The person who approves the supplier and the amount should not be the person who enters or changes the bank details. Log the date the funds were sent and the date the supplier confirmed receipt; both are needed when the shipment is late.

Where these payments go wrong

Keying the wrong term is the most common failure. An AP clerk sees a pro forma and enters it with the vendor's usual longer term because that is the default on the vendor record. The supplier does not ship, the buyer chases the order, and the payment is made late under the term that actually applied. Key cash in advance and confirm the due date equals the invoice date.

Counting from the received date instead of the invoice date is the next error. On a zero-day term the two dates should be the same day, so any due date later than the invoice date is a sign the term was keyed incorrectly or the invoice was parked. Do not let a receiving delay push the due date out; the supplier is waiting on the money, not on the receipt.

Taking a discount after the window does not apply to a CIA invoice because there is no discount window. If a discount percent or discount days appears on the voucher, question it: either the term was keyed wrong or the supplier has offered a different arrangement that needs to be documented. Paying a statement as well as the invoice is another duplication risk. The prepayment sits open on the vendor statement, and an AP clerk who pays the statement total pays the same money twice.

Re-sent invoices cause the same problem. A pro forma and a final invoice can look alike, and a supplier that re-sends a request for the same prepayment can trigger a second payment if the open prepayment is not checked first. Before releasing a cash in advance payment, search the purchase order and the vendor for an existing prepayment reference and compare the document number.

Questions